emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
From: Robert Goldman <rpgoldman@sift.info>
To: Carsten Dominik <dominik@science.uva.nl>
Cc: emacs-orgmode@gnu.org
Subject: Re: question about org-region-active-p
Date: Wed, 17 Dec 2008 10:38:41 -0600	[thread overview]
Message-ID: <49492B11.2060409@sift.info> (raw)
In-Reply-To: <531B6C47-6267-4530-ACF8-F2C1548159CE@uva.nl>

Carsten Dominik wrote:
> Dear Robert,
> also region-active-p requires transient-mark-mode to be active, if you look
> at the definition of the region-active-p function, you will see that.
> transient-mark-mode is on by default in Emacs.  Why did you turn it
> *off* in the
> first place?????

I suspect that this is an aquamacs oddity.  Aquamacs (I believe) turns
on cua-mode by default and at least in the past, cua-mode was
incompatible with transient-mark-mode, and there was even an order
dependency (you had to turn cua-mode off before turning
transient-mark-mode on).  There's a fair amount of discussion about this
that one can find by googling.  I believe that this has changed,
however, since looking at a modern copy of cua-mode.el doesn't seem to
reveal any disabling of t-m-m.

I'll be honest with you --- I don't even know HOW I turned t-m-m off,
much less why!  When I explicitly turn it ON in .emacs, all is well.
When I run aquamacs without my init files, it's on.  But nothing
directly in my .emacs turns it off, nor do I have any customizations.
This suggests that some library I'm using, somewhere, interferes with
it, but as yet I have not found it.


> - Carsten
> On Dec 17, 2008, at 3:12 PM, Robert Goldman wrote:
>> Carsten Dominik wrote:
>>> Hi Robert,
>>> no, I do not think this would make sense, to step out with
>>> an error, because all the commands that need a region will
>>> also work without one.  This is how regions work in Emacs.
>>> If you find places in the documentation where this could
>>> be made clearer, let me know.
>> Thank you Carsten for the response.  I am still inclined to think that
>> this case is one where the user should get some warning because it's in
>> that bad class of bug-like situations where code quietly does something
>> that the user does not expect and that contradicts the documentation.
>> On the other hand, I can't see where one would raise an error.  It's not
>> an error to call org-region-active-p without transient-mark-mode; indeed
>> some libraries turn this on and off, and the user is entitled not to
>> use it.
>> The call to export isn't right, because the export command does not give
>> the system any opportunity to infer whether the user intended to operate
>> on a region or on the whole.  So there's no way to tell that the user's
>> expectations are going to be violated.
>> The loading of org-mode isn't the right place, either, since the vast
>> majority of org-mode works just fine with t-m-m turned off.
>> I'm inclined to think that the answer is simply that one shouldn't turn
>> transient-mark-mode off, ever.  This works for me, but I hate to think
>> of the next person coming along to fall into this same trap, from which
>> the only means of escape is to inspect the source code and use the
>> debugger.
>> I would suggest a modification to the manual and will submit one, but
>> need clarification about one issue:  the use of t-m-m seems to be a
>> fallback for older emacsen that don't have region-active-p.  I have such
>> an emacs, so I don't know --- does this mean that on newer emacsen
>> org-region-active-p will work even without transient-mark-mode?
>> Best,
>> Robert

  reply	other threads:[~2008-12-17 16:39 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-16  1:51 question about org-region-active-p Robert Goldman
2008-12-16  2:20 ` Samuel Wales
2008-12-16  7:53 ` Carsten Dominik
2008-12-16 15:43   ` Robert Goldman
2008-12-17  8:13     ` Carsten Dominik
2008-12-17 14:12       ` Robert Goldman
2008-12-17 16:29         ` Carsten Dominik
2008-12-17 16:38           ` Robert Goldman [this message]
2008-12-17 16:44           ` Bernt Hansen
2008-12-17 17:01             ` Carsten Dominik
2008-12-18 16:48               ` Robert Goldman
2008-12-19  8:39                 ` Carsten Dominik
2008-12-16 15:52 ` William Henney

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

  List information: https://www.orgmode.org/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=49492B11.2060409@sift.info \
    --to=rpgoldman@sift.info \
    --cc=dominik@science.uva.nl \
    --cc=emacs-orgmode@gnu.org \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox


This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).